Objective To establish a direct blood lead determination methodology by graphite furnace atomic absorption spectrometry using nitric acid treated samples.
Methods Blood samples were pre-treated by 0.1% nitric acid and injected to a graphite furnace atomic absorption spectrometer.
Results The linear range of proposed determination methodology was 0.0-100.0 μg/L (r=0.999 2).The standard solutions containing lead at 25.0,50.0 and 75.0 μg/L were tested six times under the same conditions.The relative standard deviations were 1.28%-2.74% andthe average recoverty-ratios were 95.7%-102.0% for blood samples adding to the same series standard lead solutions.
Conclusion The direct blood lead determination method shows high sensitivity,good linear range and convenience in operation.
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